Epitaxial growth and magnetic properties of Fe3O4 films on TiN buffered Si(001), Si(110), and Si(111) substrates

Xiang, Hua; Shi, Fengyuan; Rzchowski, Mark S.; Voyles, Paul M.; Chang, Y. Austin

doi:doi:10.1063/1.3484278

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Microstrip superconducting quantum interference device amplifiers with submicron Josephson junctions: Enhanced gain at gigahertz frequencies

We present measurements of an amplifier based on a dc superconducting quantum interference device (SQUID) with submicron Al–AlOx–Al Josephson junctions. The small junction size reduces their self-capacitance and allows for the use of relatively large resistive shunts while maintaining nonhysteretic operation. This leads to an enhancement of the SQUID transfer function compared to SQUIDs with micron-scale junctions. The device layout is modified from that of a conventional SQUID to allow for cou...

Actual information storage with a recording density of 4 Tbit/in.² in a ferroelectric recording medium

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Epitaxial Fe₃O₄ thin films were grown on TiN buffered Si(001), Si(110), and Si(111) substrates by dc reactive sputtering deposition. Both Fe₃O₄ films and TiN buffer are fully epitaxial when grown at substrate temperatures above 150 °C, with textured single phase Fe₃O₄ resulting from room temperature growth. The initial sputtered Fe₃O₄ formed nuclei islands and then coalesced to epitaxial columnar grains with increasing film thickness. The magnetization decreases and the coercive field increases with decreasing film thickness. There is no in-plane magnetic anisotropy of epitaxial Fe₃O₄(001) on Si(001) but Fe₃O₄ films grown on Si(110) and Si(111) substrates show uniaxial in-plane magnetic anisotropy.

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KEYWORDS and PACS

Keywords

coercive force, iron compounds, magnetic anisotropy, magnetic epitaxial layers, sputter deposition, surface texture, vapour phase epitaxial growth

PACS

81.15.Cd

Deposition by sputtering
68.55.at

Other materials
75.70.Ak

Magnetic properties of monolayers and thin films
81.15.Kk

Vapor phase epitaxy; growth from vapor phase
75.30.Gw

Magnetic anisotropy
75.60.Ej

Magnetization curves, hysteresis, Barkhausen and related effects

ARTICLE DATA

Digital Object Identifier

http://dx.doi.org/10.1063/1.3484278

PUBLICATION DATA

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0003-6951 (print)

1077-3118 (online)

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$abstract.society.value is a Member of CrossRef

American Institute of Physics

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